What is purpose of scope resolution operator?

Question

Also abbreviated as (::) what is its purpose when dealing with object oriented programming

Answer 1

https://www.geeksforgeeks.org/scope-resolution-operator-in-c/

Answer 2

You'll mostly need it for header files. For example class declaration in file.h, but the implementation in file.cpp.
To implement the method you need the scope resolution operator.

Answer 3

//You can use it to access global variables in this scenario

#include <iostream>
using namespace std;
int x=9; //global variable
int main() {
int x=5; //local variable with same name but different scope
cout<<x<<endl; //returns local variable, 5
cout<<::x<<endl; //returns global variable, 9
return 0;
}

//hope that helps

Answer 4

You can also use the scope resolution operator to access a class' static members from outside the class,
#include <iostream>
using namespace std;
class X {
public:
static int count;
};
int X::count = 10; // define static data member

int main () {
int X = 0; // hides class type X
cout << X::count << endl; // use static member of class X
}
This will give the output:
10